3 years ago

A box contains 35 coins either nickels or dimes all worth $2.90. How many dimes are in the box?

Mathematics

1 answer:

tino4ka555 [31]3 years ago

3 0

Answer:

There are 23 dimes in the box

Step-by-step explanation:

Let nickels=n

Let dimes=(35-n)

Equation: 0.05n+0.10(35-n)=2.90

Multiply both sides by 100: 5n+10(35-n)=290

-5n+350=290

-5n=-60

n=12

35-12=23

Therefore, there are 23 dimes in the box

You might be interested in

I need help with the 6 tasks. Please help me i have a test

jarptica [38.1K]

This is my answer. 0 < x < 0,5

6 0

3 years ago

What is 2 hundreds+ 2 tens + 18 ones

3241004551 [841]

When you add them together you get 238.

5 0

3 years ago

the perimeter of the rectangle below is 98 units. Find the length of CD. Write your answer without variables. cd=4x+3 cb=5x+1

zimovet [89]

$2(4x + 3) + 2(5x + 1) = 98 \\ 8x + 6 + 10x + 2 = 98 \\ 18x + 8 = 98 \\ 18x = 90 \\ x = 5$
Substitute x with 5,

CD =
$4x + 3 \\ = 4(5) + 3 \\ = 20 + 3 \\ = 23$
CD = 23 units

Hope this helps.

7 0

3 years ago

Read 2 more answers

Plz help me with these two questions I have no idea how to do this

viktelen [127]

(7-3+4^3/2) / (9-5)
7-3+64/2) / 4
(7-3 + 32) / 4
(4 + 32) / 4
36/4 = 9

48 + 72
24(2 + 3)

8 0

4 years ago

please help me i have a huge science test that i have to study for after this so PLEASE HELP ME GET THE ANSWER

enot [183]

Usually, quadratic equations equal 0, and to find the solution you need to make x equal the value that, when added or subtracted to the rest of its bracket, makes 0. This means that your answer is (x + 5)(x - 2) = 0, because 5 - 5 = 0 and 2 - 2 = 0. I hope this helps! Let me know if you would like me to explain further :)

4 0

3 years ago